HTML Attributes reference

"ismap" - html Attribute

Server-side image maps may be interesting in cases where the image map is too complicated for a client-side image map.

It is only possible to define a server-side image map for the IMG and INPUT elements. In the case of IMG, the IMG must be inside an A element and the boolean attribute ismap ([CI]) must be set. In the case of INPUT, the INPUT must be of type "image".